Method And Apparatus For PUCCH Carrier Switching And PUCCH Repetition In Mobile Communications

Abstract

Various solutions for PUCCH carrier switching and PUCCH repetition with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive downlink control information (DCI) on a physical downlink control channel (PDCCH) configuring a carrier switching indication and a PUCCH repetition indication. The apparatus may receive downlink data on a physical downlink shared channel (PDSCH). The apparatus may perform a PUCCH carrier switching or a PUCCH cell switching according to the carrier switching indication when transmitting uplink control information (UCI) corresponding to the downlink data. The apparatus may perform a PUCCH repetition by retransmitting the UCI according to the PUCCH repetition indication.

What is claimed is: 
     
         1 . A method, comprising:
 receiving, by a processor of an apparatus, downlink control information (DCI) on a physical downlink control channel (PDCCH) configuring a carrier switching indication and a PUCCH repetition indication;   receiving, by the processor, downlink data on a physical downlink shared channel (PDSCH);   performing, by the processor, a PUCCH carrier switching or a physical uplink control channel (PUCCH) cell switching according to the carrier switching indication when transmitting uplink control information (UCI) corresponding to the downlink data; and   performing, by the processor, a PUCCH repetition by retransmitting the UCI according to the PUCCH repetition indication,   wherein the carrier switching indication comprises a cell for transmitting the UCI when performing the PUCCH carrier switching or the PUCCH cell switching, and   wherein when performing the PUCCH repetition, all the retransmitted UCI are transmitted on the cell indicated in the DCI.   
     
     
         2 . The method of  claim 1 , wherein the PUCCH carrier switching or the PUCCH cell switching is dynamically configured. 
     
     
         3 . The method of  claim 1 , wherein the PUCCH repetition indication comprises a number of the PUCCH repetition. 
     
     
         4 . The method of  claim 1 , wherein the PDSCH is transmitted on one of a primary cell (PCell) and a secondary cell (SCell), and wherein the UCI is transmitted on one of the PCell and a PUCCH switching secondary cell (PUCCH-sSCell). 
     
     
         5 . The method of  claim 1 , wherein the DCI indicates a PUCCH resource indicator (PRI) for the PUCCH repetition. 
     
     
         6 . The method of  claim 1 , wherein the DCI is a fallback DCI. 
     
     
         7 . An apparatus, comprising:
 a transceiver which, during operation, wirelessly communicates with a network node of a wireless network; and   a processor communicatively coupled to the transceiver to perform operations comprising:
 receiving, via the transceiver, a downlink control information (DCI) on a physical downlink control channel (PDCCH) configuring a carrier switching indication and a PUCCH repetition indication; 
 receiving, via the transceiver, downlink data on a physical downlink shared channel (PDSCH); 
 performing a PUCCH carrier switching or a physical uplink control channel (PUCCH) cell switching according to the carrier switching indication when transmitting uplink control information (UCI) corresponding to the downlink data; and 
 performing a PUCCH repetition by retransmitting the UCI according to the PUCCH repetition indication, 
   wherein, in performing the PUCCH carrier switching or the PUCCH cell switching, the carrier switching indication comprises a cell for transmitting the UCI, and   wherein, in performing the PUCCH repetition, all the retransmitted UCI are transmitted on the cell indicated in the DCI.   
     
     
         8 . The apparatus of  claim 7 , wherein the PUCCH carrier switching or the PUCCH cell switching is dynamically configured. 
     
     
         9 . The apparatus of  claim 7 , wherein the PUCCH repetition indication comprises a number of the PUCCH repetition. 
     
     
         10 . The apparatus of  claim 7 , wherein the PDSCH is transmitted on one of a primary cell (PCell) and a secondary cell (SCell), and wherein the UCI is transmitted on one of the PCell and a PUCCH switching secondary cell (PUCCH-sSCell). 
     
     
         11 . The apparatus of  claim 7 , the DCI indicates a PUCCH resource indicator (PRI) for the PUCCH repetition. 
     
     
         12 . The method of  claim 1 , wherein the DCI is a fallback DCI.